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Titolo:
Visible light photodegradation of 4-chlorophenol with a coke-containing titanium dioxide photocatalyst
Autore:
Lettmann, C; Hildenbrand, K; Kisch, H; Macyk, W; Maier, WF;
Indirizzi:
Max Planck Inst Kohlenforsch, D-45470 Mulheim, Germany Max Planck Inst Kohlenforsch Mulheim Germany D-45470 70 Mulheim, Germany Max Planck Inst Strahlenchem, D-45413 Mulheim, Germany Max Planck Inst Strahlenchem Mulheim Germany D-45413 13 Mulheim, Germany Univ Erlangen Nurnberg, Inst Anorgan Chem, D-91058 Erlangen, Germany Univ Erlangen Nurnberg Erlangen Germany D-91058 -91058 Erlangen, Germany
Titolo Testata:
APPLIED CATALYSIS B-ENVIRONMENTAL
fascicolo: 4, volume: 32, anno: 2001,
pagine: 215 - 227
SICI:
0926-3373(20010830)32:4<215:VLPO4W>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
PARAMAGNETIC-RES MEASUREMENTS; HETEROGENEOUS PHOTOCATALYSIS; AQUEOUS-SOLUTIONS; SEMICONDUCTOR PHOTOCATALYSIS; TIO2 PHOTOCATALYST; HYDROGEN MORDENITE; LOW-COST; DEGRADATION; SUSPENSIONS; WATER;
Keywords:
visible light photodegradation; photosensitisation; photocurrent;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Maier, WF Max Planck Inst Kohlenforsch, Kaiser Wilhelm Pl 1, D-45470 Mulheim, Germany Max Planck Inst Kohlenforsch Kaiser Wilhelm Pl 1 Mulheim Germany D-45470
Citazione:
C. Lettmann et al., "Visible light photodegradation of 4-chlorophenol with a coke-containing titanium dioxide photocatalyst", APP CATAL B, 32(4), 2001, pp. 215-227

Abstract

Photocatalysts based on titanium dioxide have been prepared by a modified sot-gel process using different alkoxide precursors. Depending on the precursor and the calcination temperature of the gels, carbon-containing catalysts with large surface areas, capable to photodegrade p-chlorophenol (4CP) with visible light (lambda > 400 nm), have been obtained. Photodegradation and mineralisation were confirmed by HPLC and TOC measurements. The catalysts were characterised by physisorption of argon, elemental analysis, EPR, UV/VIS, X-ray powder diffraction (XRD), FT-IR and high-resolution transmission electron microscopy (HRTEM). A highly condensed, carbonaceous species formed during calcination is responsible for the photosensitisation. When usedas a photoelectrode, the appearance of a photocurrent indicated the semiconductor nature of these novel materials. The catalysts exhibit a surprisingly good long-time stability despite of the carbonaceous nature of the sensitising species. It is also shown, that commercially available TiO2 can be photosensitised by impregnation with suitable alcohols followed by pyrolysis. (C) 2001 Elsevier Science B.V All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 16:34:22